The upcoming 'Game of Thrones' prequel series titled 'House of the Dragon' at HBO has cast actors Milly Alcock and Emily Carey in recurring roles.

According to Variety, the prequel will be set a few hundred years prior to the events of 'Game of Thrones' and tells the story of House Targaryen and the Targaryen civil war that became known as the "Dance of the Dragons."

HBO has given 'House of the Dragon' a 10-episode order with an eye toward a 2022 debut.